Hail in O'brien County, Iowa

Hail September 22, 2025 · O'brien County, Iowa

1 in

Hail diameter

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Quarter size hail fell for approximately 5 minutes.

The wider storm

An isolated thunderstorm developed along a slow-moving frontal boundary across northwest Iowa. Seasonally high instability (around 2000 J/kg MLCAPE) and weak shear led to very strong updrafts, producing large hail that caused significant damage to late season crops.

Began near Primghar (43.0600, -95.6800).

Source: NOAA Storm Events Database, event 1292890. Narratives are written by the National Weather Service forecast office that issued the report.

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